Improvement in locks



Diarree STATES PATENT rirca.

ANDREW OLABAUGH, OF ALTOONA, PENNSYLVANIA.

IMPROVEMENT IN LOCKS.

Specification forming part of LettersPatent No. 39,1 l?, dated July 7, 1863.

To all whom it may concern:

Be it known that I, A. GLABAUGH, of Altoona, in the county of Blair and State of Pennsylvania., have invented a new and Improved Lock, and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part ot' this specification, in which- Figure 1 is a view of the inner side of a door having my invention applied to it; Figs. 2 and 3, internal views of my invention 5 Fig. 4, an external view of the same, showing its application to an ordinary lock; Fig. 5, a view of the inner side of the front plate of the lock with a certain part attached to it; Figs. 6 and 7, detached views of the key of the lock.

Similar letters of reference indicate corresponding parts in the several figures.

The object ot' this invention is to combine a bar with a lock in such a manner that the bar, which is at the inner side of the door, may be opened by means of the key from the outer side of the door, the bar being so arranged as to extend entirely across the door and serve as a far more secure and eftlcientfastening than the ordinary lockfbolts, and more the case A, and has two arms, a a, projecting at right angles from its inner side, said arms projecting through a vertical slot, b, in the back plate, c, ofthe case A, as shown in Fig. 1. The front side of the slide B has a lateral projection, d, as shown clearly in Figs. 2 and 3, said projection being formed by a curved recess in one side ot' the slide.

C is a disk, nearly circular in form, which is tted loosely on a iixed. spindle or arbor, DX, attached horizontally to the inner side of the back plate. rI his disk is provided with two teeth, e e, and it also has a recess, f, made init near its edge, in which a spring, g, is

tted, said spring being of curved form and permanently attached to the disk. The recess j' admits of a certain degree of play of the spring fj-that is to say, allows it to be pressed inward a certain distance under the action of the key, as will be presently shown. The spring g is so curved as to conform to the shape of the disk C, and form what may be termed a segment thereof', as shown in Figs. 2 and 3, the spring being at the edge of the disk and at its lower part.

D represents a slide, which is fitted within the case A, and is of right-angular form, the upper horizontal part, 7L, having two recesses, i i, made in it for the teeth e e of the disk C to work in, and the vertical part j having a projecting rib, 7c, extending its whole length. The function of this slide D is to keep the slide B down and prevent it being raised except in a legitimate manner through the medium of the key of the lock. The outer end of the horizontal part h of the slide D, tits over a projection, I, at the inner side of the slide B, as shown by the dotted lines in Fig. 2. A spring, E, which acts against the slide D,`has a tendency to throw the slide D toward the slide B, as shown in Figs. 2 and 3. 'Ihe slide B also has a recess, m, at its inner side to receive at a certain time the outer end of the part h of the slide D, as will be presently shown.

F represents what may be termed a tumbler, which is of right-angular form, its vertical part n being slotted, so as to receive a stump or guide, o. The vertical part a extends upward behind the vertical part j of the slide D when the lock is in a locked state, and prevents the slide D being casually or illegitimately moved back to release the vertical slide B. The lower horizontal part, p, of the tumbler F is for the key to act upon.

G is a spring, which bears against the lower part of the tumbler F, and has a tendency to keep it pressed upward. (See Figs. 2 and 3.)

H is a bolt, which is at the inner side of the door, and is secured at one end to the same jamb, q, of the doorframe to which the door I is hinged. The opposite end of the bolt, when thedoor is locked, fits in a nosing, J, attached to the other jamb, r, of the rdoor-frame, said bolt also tting between the arms a a of the slide B. (See Fig. 1.)

To the inner side ofthe front plate, s, of the lock-case A there is fitted a semioircnlar s lide, K. (Shown clearly in Fig. 5.) This slide moves in the arc of a circle, and by a person ignorant of the lock is actuated by the key L, as will presently be shown.

The operation is as follows: Suppose, for instance, the lock to be in a locked state, in which condition the slide B is down, as shown in Fig. 2, and the bolt H within the nosing J, as shown in Fig. l. In order to unlock the lock, the key L is inserted in the lock from the outer side of the door, and when fully pressed in, so that its bit a.X will bear against the disk G, is drawn a trifle backward or outward, so that the bit ax as it is turned to the left may avoid the rib 7o on the vertical partj ofthe slide D. The bit a tirst acts upon the lower part, p, ofthe tumbler F, and presses the latter down until its vertical part n is below the vertical part j ot the slide D, as shown in red in Fig. 2, and the bit LX is then in Contact with the spring g, and the key is forced inward, so that the bit aX will catch against the edge bX of the recess f of the disk C, and the movement of the key being continued in the same direction as before, the disk C will be turned toward the leftand the slide D thrown back, as shown in blue, in consequence of the teeth e e gearing into the recesses it' in the part h of D. The bit aX also catches against the projections d of the slide B, and it raises it, and also the bolt H, until the disk C has been turned to the extent of its movement, which is shown in blue in Fig. 2. The key is then drawn backward or outward, the slide B still resting upon the key-bit, until the bit ax is free from the edge 11X of the recessf. The key is then turned in the same direction, and the slide B and bolt H elevated until the recess m in the side of the slide B is brought in line with the outer part, h, of the slide D, when the spring E throws the outer part, h, of the slide D into said recess, and said part h holds the slide B in a partially elevated state. The bit aX of the key has now made a complete revolution, and4 the slide B is half elevated. The key is then turned a second revolution and manipulated the same as before, the bit a acting against the bottom of the slide B, and fully elevatingit, as shown in Fig. 3, and the bolt H, which is raised out of the nosing J, as shown in red outline in Fig. 1, and the door is unlocked.

In Fig. 4 the invention is shown applied to an ordinary lock, M. In this arrangement a separate key is required for the lock M, but all the parts may be within one case.

I would remark that the semicircular slide K is used as a guard to prevent the illegitimate opening of the lock. A person unacquainted with the mechanism of the lock would allow the bit ax of the key, or a pick or skeleton key, to strike the lower end of K and actuate it. The upper end of Kwill then strike a projection, 0X on D, and throw D back, so as to let down B, and cause all the parts to resume their original position.

A person acquainted with the construction of the lock, and consequently aware of the posi tion of the semicircular slide K and the function it performs when actuated, would avoid striking it with the key.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The disk C, provided with the spring g, the slide D, tumbler F, and slide B7 all arranged and combined to operate in connection with the bolt H, as and for the purpose specied.

2. The semicircular slide or guard K, when combined and arranged with the disk G, slide D, tumbler F, and slide B, for the purpose specified.

AN DREW CLAB AGH.

Witnesses:

J AcoB SNYDER, PETER N. MARKS. 

